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Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2017
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The calculation of basic and diluted earnings per common share are as follows (in thousands, except per share amounts):
 
December 31
 
2017
 
2016
 
2015
Numerator:
 
 
 
 
 
Earnings from continuing operations
$
21,740

 
$
21,060

 
$
39,155

 
 
 
 
 
 
Denominator:
 
 
 
 
 
Weighted-average shares outstanding for basic earnings per share
58,907

 
61,330

 
64,242

Common equivalent shares:
 
 
 
 
 
Effect of stock-based compensation awards and warrants
779

 
1,664

 
885

Weighted-average shares outstanding assuming dilution
59,686

 
62,994

 
65,127

Basic earnings per share from continuing operations
$
0.37

 
$
0.34

 
$
0.61

Diluted earnings per share from continuing operations
$
0.36

 
$
0.33

 
$
0.60